<template>
  <div>
    <el-upload
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      class="editor-img-uploader"
      v-if="type == 'url'">
      <i ref="uploadRef" class="editor-img-uploader"></i>
    </el-upload>
  </div>
  <div class="editor">
    <quill-editor
      ref="quillEditorRef"
      v-model:content="content"
      contentType="html"
      @textChange="e => $emit('update:modelValue', content)"
      :options="options"
      :modules="modules"
      :toolbar="toolbar"
      :style="styles" />
  </div>
</template>

<script setup>
  import { QuillEditor } from '@vueup/vue-quill'
  import BlotFormatter from 'quill-blot-formatter'
  import '@vueup/vue-quill/dist/vue-quill.snow.css'
  import { getToken } from '@/utils/user'
  import { UPLOADER, RESPONSE } from '@/config'

  const { proxy } = getCurrentInstance()

  const quillEditorRef = useTemplateRef('quillEditorRef')
  const uploadUrl = ref(UPLOADER.IMAGE) // 上传的图片服务器地址
  const headers = ref({
    Authorization: 'Bearer ' + getToken()
  })

  const props = defineProps({
    /* 编辑器的内容 */
    modelValue: {
      type: String
    },
    /* 高度 */
    height: {
      type: Number,
      default: 300
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: 300
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false
    },
    /* 上传文件大小限制(MB) */
    fileSize: {
      type: Number,
      default: 5
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: 'base64'
    }
  })

  const options = ref({
    debug: false,
    modules: {},
    placeholder: '请输入内容',
    readOnly: props.readOnly,
    theme: 'snow',
    bounds: document.body,
    strict: false
  })
  // 工具栏配置
  const toolbar = ref([
    ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
    ['blockquote', 'code-block'], // 引用  代码块
    [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
    [{ indent: '-1' }, { indent: '+1' }], // 缩进
    [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
    [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
    [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
    [{ align: [] }], // 对齐方式
    ['clean'], // 清除文本格式
    ['link', 'image', 'video'] // 链接、图片、视频
  ])

  const modules = ref({
    name: 'blotFormatter',
    module: BlotFormatter,
    options: {}
  })

  const styles = computed(() => {
    let style = {}
    if (props.minHeight) {
      style.minHeight = `${props.minHeight}px`
    }
    if (props.height) {
      style.height = `${props.height}px`
    }
    return style
  })

  const content = ref('')
  watch(
    () => props.modelValue,
    v => {
      if (v !== content.value) {
        content.value = v == undefined ? '<p></p>' : v
      }
    },
    { immediate: true }
  )

  // 如果设置了上传地址则自定义图片上传事件
  onMounted(() => {
    if (props.type == 'url') {
      let quill = quillEditorRef.value.getQuill()
      let toolbar = quill.getModule('toolbar')
      toolbar.addHandler('image', value => {
        if (value) {
          proxy.$refs.uploadRef.click()
        } else {
          quill.format('image', false)
        }
      })
    }
  })

  // 上传前校检格式和大小
  function handleBeforeUpload(file) {
    const type = ['image/jpeg', 'image/jpg', 'image/png', 'image/svg']
    const isJPG = type.includes(file.type)
    //检验文件格式
    if (!isJPG) {
      proxy.$modal.msgError(`图片格式错误!`)
      return false
    }
    // 校检文件大小
    if (props.fileSize) {
      const isLt = file.size / 1024 / 1024 < props.fileSize
      if (!isLt) {
        proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`)
        return false
      }
    }
    return true
  }

  // 上传成功处理
  function handleUploadSuccess(res, file) {
    // 如果上传成功
    if (res.code == RESPONSE.SUCCESS_CODE) {
      // 获取富文本实例
      let quill = toRaw(quillEditorRef.value).getQuill()
      // 获取光标位置
      let length = quill.selection.savedRange.index
      // 插入图片，res.url为服务器返回的图片链接地址
      quill.insertEmbed(length, 'image', res.data.url)
      // 调整光标到最后
      quill.setSelection(length + 1)
    } else {
      proxy.$modal.msgError('图片插入失败')
    }
  }

  // 上传失败处理
  function handleUploadError() {
    proxy.$modal.msgError('图片插入失败')
  }
</script>

<style>
  .editor-img-uploader {
    display: none;
  }
  .editor,
  .ql-toolbar {
    white-space: pre-wrap !important;
    line-height: normal !important;
  }
  .quill-img {
    display: none;
  }
  .ql-snow .ql-tooltip {
    transform: translateX(-50%) !important;
    left: 50% !important;
  }
  .ql-snow .ql-tooltip[data-mode='link']::before {
    content: '请输入链接地址:';
  }
  .ql-snow .ql-tooltip.ql-editing a.ql-action::after {
    border-right: 0px;
    content: '保存';
    padding-right: 0px;
  }
  .ql-snow .ql-tooltip[data-mode='video']::before {
    content: '请输入视频地址:';
  }
  .ql-snow .ql-picker.ql-size .ql-picker-label::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item::before {
    content: '14px';
  }
  .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
    content: '10px';
  }
  .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
    content: '18px';
  }
  .ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
    content: '32px';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item::before {
    content: '文本';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
    content: '标题1';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
    content: '标题2';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
    content: '标题3';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
    content: '标题4';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
    content: '标题5';
  }
  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
    content: '标题6';
  }
  .ql-snow .ql-picker.ql-font .ql-picker-label::before,
  .ql-snow .ql-picker.ql-font .ql-picker-item::before {
    content: '标准字体';
  }
  .ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
  .ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
    content: '衬线字体';
  }
  .ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
  .ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
    content: '等宽字体';
  }

  .blot-formatter__toolbar-button {
    display: inline-flex !important;
  }
</style>
